89645 has 4 divisors (see below), whose sum is σ = 107580. Its totient is φ = 71712.

The previous prime is 89633. The next prime is 89653. The reversal of 89645 is 54698.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40804 + 48841 = 202^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 89645 - 2¹² = 85549 is a prime.

It is a super-3 number, since 3×89645³ = 2161222446033375, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8960 + ... + 8969.

It is an arithmetic number, because the mean of its divisors is an integer number (26895).

2⁸⁹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

89645 is a deficient number, since it is larger than the sum of its proper divisors (17935).

89645 is a wasteful number, since it uses less digits than its factorization.

89645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17934.

The product of its digits is 8640, while the sum is 32.

The square root of 89645 is about 299.4077487307. The cubic root of 89645 is about 44.7550476501.

The spelling of 89645 in words is "eighty-nine thousand, six hundred forty-five".